Combined graphophone reproducer and radioreceiver



Rb,1'4,1928; I 1,659,128

R. W. ARNETT COMBINED GRAPHOPHONE REPRODUCER AND RADIORECEIVER Filed April 20, 1925 I N VEN TOR.

Elam/e0 11 ABA/Err BY ATTORNEYS.

1,659,128 PATENT. OFFICE.

RICHARD W. ABNETT, 0F INGLEWOOD, CALIFORNIA.

CO KBINED GBAPHOPHONE REPRODUCEB AND RADIORECEIVFIR.

Application filed s in 20, 1925. Serial No. 24,519.

My invention relates to and has for its purpose the provision of a graphophone reproducer and radio receiver combined in a single unit in such a manner that the receiver utilizes the diaphragm of the reproducerto convert electrical impulses from a radio receiving set into sound and thereby embodying the sound amplifying means of any conventional graphophone as a loud speaker for radio receiving sets. Heretofore, radio receiving devices in their association with graphophone reproducers have been constructed and used as a separate unit thus necessitating the complete removal of the reproducer from the tone arm when applying the receiver, or the mechanical connecting ot' the radio receiver with the reproducer in order-to use the receiver with the reproducer, and conversely, the mechanical disconnecting of the receiver from the reproducer when using the reproducer alone. By incorporating in a graphophone reproducer a radio re-' ceiver so as to form a unitary structure the arbitrary use of'either is permitted without necessitating the removal or disconnection of either.

I will describe only one form of combined graphophone reproducer and radio receiver embodying my invention, and will then point out the novel features thereof in claim.

In the accompanying drawings Figure 1 is a view showing in vertical section one form of combined reproducer and receiver embodying my'invention in applied position to the tone arm of a graphophone.

Figure 2 is a horizontal sectional view taken on theline 22 of Figure 1.

Figure 3 is a view showing the invention in front elevation with the cover casing re-' moved.

Figure 4 is anenlar ed fragmentary sectional view taken on t e line 4-4 0 Fig ure 3.

Referring specifically to the drawings in which similar reference characters refer to similar parts in each of the view, my invention in its present embodiment comprises a graphophone reproducer having a casing 15 open at one side and provided at the other side with a tubular extension 16 designed to receive the tone arm 17 of a graphophone so that the casing as a unit is supported on the tone arm. The open side of the casing 15 is closed by a cover plate 18 having a pcripheral flange 19 secured to the casing by means of screws or other suitable fastening members 20. Within the casing 15 is a diaphragm 21 to the axle of which is connected the upper end of a stylus arm 22'which extends through a suitable slot 23 formed in the cover plate 18 for pivotal mounting upon the periphery of the casing 15 at a point indicated at 24 The stylus arm 22 is provided with a conventional needle receiving socket 25 and a set screw 26 for securing the needle within the socket.

The radio receiver embodying my invention comprises in the present instance a permanent magnet 27 secured to the cover plate 18 as clearly shown in Figure 2 and to windings 28 spaced to accommodate therebetween an armature 29 pivoted at a point indicated at 30.

From a radio receiving set (not shown) electrical impulses are supplied to the windings 28 through conductors 31 connected to binding posts 32, and to which latter the terminals of the windings are electrically connected. The armature 29 is actuated by the electrical impulses transmitted to the windings from the receiving set, and this armature is normally urged to the extreme o' sition shown in Figure 2 by means oi a spring 33 engaging a lip 34 on one end of the armature. The opposite end of the armature is provided with a lip 35 to which one'end of a rod 36 is secured, the latter extending through the slot of the cover plate 18 and secured to the diaphragm 21 at the same point at which the stylus arm is secured, as clearly illustrated in Figure 1. Through this connection the movements of the armature 29 are transmittedto the dia phragm. 1 i

In order to protect the parts of the receiver, a cover casing 37 is secured to the cover plate 18 through the medium of screws (not. shown) which extend through openings application to the toiie arm 17 and when in 7 applied position permits of the'normal op-' eration of the stylus arm to vibrate the diaphragm when the device is used as a graphophone reproducer. Although the armature of the receiver maintains operative connection with the diaphragm, its interference with the diaphragm is negligible so that it can be said that the association of the radio receiver with the reproducer in no Way impairs the normal operation of the reproducer.

When employing the invention as a radio receiver, the electrical impulses transmitted to the windings of the magnet oscillate the armature about its pivot thereby reciprocating the rod 36 to vibrate the diaphragm 21. In this manner the electrical impulses are converted to sound which is ultimately amplified through the conventional sound amplifyii-ig means of the graphophone.

Although I have herein shown and described only one form of combined graphophone reproducer and radio receiver embodying my invention, it is to be understood that various changes and'modifications may be made therein Without departing from the spirit jof the invention and the spirit and scope of the appended claim.

What I claim is:

In combination, a graphophone reproducer comprising a casing having an open side, a diaphragm in the casing, a slotted cover plate secured to the casing and closing the open side thereof, a stylus arm pivoted on the casing to extend through the slot of said cover plate and fixedly secured to said diaphragm, and a radio receiver secured to the cover plate and having a movable armature and a rod secured to the armature and extending through the slot of said plate and secured to the diaphragm, the free end of the stylus arm being curved inwardly towards the diaphragm so as to permit the arm to be secured to the rod at substantially the same point at which the rod is secured to the diaphragm.

RICHARD W. ARNETT. 

